/Engine/Plugins/Runtime/MassEntity/Source/MassEntity/Public/MassEntityManager.h
void BatchAddFragmentInstancesForEntities ( TConstArrayView< [FMassArchetypeEntityCollectionWithPayload](API\Plugins\MassEntity\FMassArchetypeEntityCollectionWi-) > EntityCollections, const [FMassFragmentBitSet](API\Plugins\MassEntity\FMassFragmentBitSet) & FragmentsAffected )